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Note 8 - Line of Credit (Details Textual) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Oct. 01, 2022
Oct. 18, 2019
Long-Term Line of Credit, Noncurrent $ 6,657 $ 8,783    
Citizens Bank of Pennsylvania [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity       $ 45,000
Debt Instrument, Interest Rate, Effective Percentage 6.40%   2.70%  
Long-Term Line of Credit, Noncurrent $ 6,700 8,800    
Letters of Credit Outstanding, Amount 2,000 1,900    
Line of Credit Facility, Remaining Borrowing Capacity $ 36,300 $ 34,300